打完疫苗 感觉不痒不痛
System.out.println("90 度的正弦值:" + Math.sin(Math.PI/2));
System.out.println("0度的余弦值:" + Math.cos(0));
System.out.println("60度的正切值:" + Math.tan(Math.PI/3));
System.out.println("1的反正切值: " + Math.atan(1));
System.out.println("π/2的角度值:" + Math.toDegrees(Math.PI/2));
System.out.println(Math.PI);
90 度的正弦值:1.0
0度的余弦值:1.0
60度的正切值:1.7320508075688767
1的反正切值: 0.7853981633974483
π/2的角度值:90.0
3.141592653589793
https://blog.csdn.net/chelen_jak/article/details/80451819